99 results found for TechView: Wireless, displaying items 1 - 20
January 29, 2009 Automatic Digital Antenna Tuning Fits Multiple Wireless Applications
Peregrine Semiconductor’s DuNE technology solves one of the orneriest problems in RF design—antenna impedance matching. In every wireless application, an antenna has to be connected to the radio. That invariably means the imposition of some kind of impedance- matching circuit between the transmitter/receiver and the antenna. Impedance matching is essential for maximum power output/ input, minimum voltage standing-wave ratio (VSWR) ...
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Louis E. Frenzel
October 16, 2008
Product Portfolio Covers Wireless USB Needs
Including a USB-IF certified wireless host controller interface (WHCI) and host wire adapter (HWA) host controllers as well as native and device wire adapter (DWA) devices, Realtek Semiconductor offers a complete Wireless USB product portfolio that’s unique in the industry.
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Louis E. Frenzel
October 16, 2008
Single-Chip Transceiver Targets Wireless USB Apps
The WSR601 single-chip Wireless USB transceiver from Wisair is a single-die CMOS device targeting host and device Wireless USB applications. It implements PHY, MAC, and Wireless USB subsystems in a small form factor.
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Louis E. Frenzel
October 9, 2008 Millimeter-Wave MMIC Power Amp Operates From 18 To 33 GHz
Getting high output power and excellent linearity in a millimeter-wave amplifier is no easy trick. But Avago has done it with its AMMC/P-6333 (see the figure). This high-performance driver amplifier offers high gain and power with excellent input and output return losses. It also targets the need for broadband and eliminates the need for a negative voltage. Primary...
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Louis E. Frenzel
October 9, 2008 Sensor Offers Web-Based Monitoring
Sensor Offers Web-Based Monitoring Remote monitoring of temperature and other physical environmental characteristics just got easier with Newport Electronics’ wiSeries wireless sensors. This radio complies with IEEE’s 802.15.4 standard and transmits on one of 16 channels in the 2.4- to 2.483.5-GHz ISM band. The device uses direct-sequence spread spectrum (DSSS) and a star network topology. Unlike most radios using this standard, the wiSeries...
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Louis E. Frenzel
August 28, 2008 ZigBee Wireless Module Sports 32-Bit ARM Processor
Lots of companies make IEEE 802.15.4 and ZigBee wireless modules, but only California Eastern Laboratories (CEL) offers one with an internal 32-bit ARM processor. The FreeStar Pro is a complete radio module that’s ready to go as a node in wireless network (see the figure). Based on Freescale Semiconductor’s MC13224V Platform-in-Package (PiP), the FreeStar Pro features the ARM 32-bit ...
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Louis E. Frenzel
August 11, 2008
Wireless Gateway Makes Building A Point-To-Point Multipoint ZigBee Network Easy
The Digi International ConnectPort X is a ready-made gateway designed to speed the implementation of 802.15.4 or ZigBee wireless networks. It lets modular wireless nodes connect to the Internet via cellular, Wi-Fi, and Ethernet IP services to provide remote monitoring and control.
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Louis E. Frenzel
June 19, 2008
Bluetooth, Low-Power Bluetooth, GPS, And FM Radios Fit On One Chip
Cambridge Silicon Radio’s BlueCore 7 chip incorporates four separate radios in a fully integrated package targeting cell phones. The radios include an FM receiver and transmitter, ultra-low-power Bluetooth for short-range sensor applications, the standard Bluetooth version 2 + EDR transceiver, and a GPS receiver using an enhanced mode to provide location information when GPS satellites are out of view.
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Louis E. Frenzel
June 19, 2008
Receiver Chip Brings Broadcast TV To Laptops
Some high-end desktop PCs offer optional TV tuners, but they haven’t been practical for laptops until now. Laptops and other portable devices equipped with the FlexiTV chip set from Mirics Semiconductor can receive over-the-air TV broadcasts.
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Louis E. Frenzel
June 19, 2008
Programmable Wireless Baseband Chip Handles Any OFDM Standard
The fully programmable Odyssey 8500 baseband chip works with a wide range of available RF front ends. Its eight programmable DSPs handle all the OFDM and related processing, including multiple-input/multiple-output (MIMO) and other features. The chip also includes a PowerPC RISC processor and 32 Mbits of DRAM for related control functions.
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Louis E. Frenzel
May 22, 2008 Software-Defined Transceiver Chip Handles Any Band And Protocol
Imagine handsets that can work on any network, in any country, and on any frequency with the prevailing protocol and with seamless handoffs. Such devices do exist, but they aren’t cheap. The implementation of multimode and multiband wireless devices requires multiple transceivers, increasing cost as well as power consumption and size—specs that commodities like cell phones can’t afford. Software-defined radio (SDR) offers a potential solution, but it also is...
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Louis E. Frenzel
May 8, 2008
Network Processor Simplifies ZigBee Design
The Texas Instruments Z-Accel CCZACC06 contains the complete 802.15.4 radio and ZigBee stacks. It interfaces to the processor of your choice via SPI or UART where the application software will reside.
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Louis E. Frenzel
May 8, 2008
Fast Serial 16-Bit ADC Cuts Pin Count And PCB Space
Only two wires are needed to connect the 105-Msample/s LTC2274 ADC to an FPGA, reducing board space and decreasing noise and crosstalk. The serial interface can reach 2.1 Gbits/s, and it’s compatible with FPGAs like the Xilinx Rocket IO, Altera Stratix II GX I/O, and Lattice ECP2M I/O.
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Louis E. Frenzel
May 8, 2008
Wireless Pot Pourri Serves Diverse Applications
Consider wireless for your next project. Engineers are designing wireless capability into almost everything these days. With so many wireless chips and modules available at low prices, it’s easy to do and often provides the differentiation you’re looking for in a new product.
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Louis E. Frenzel
April 10, 2008 SiP Module Bridges Gap Between RF And Digital In Wireless Receivers
Modern wireless system design is usually a team effort, with RF engineers working on the front end and the baseband guys working on the digital back end. The trouble in receiver design, though, is at the interface where the downconverted signal at some IF must then be digitized and sent to the baseband section. This is a tricky area that neither the RF nor baseband engineers are generally prepared to attack. A mixed-signal expert is usually needed to build...
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Louis E. Frenzel
March 26, 2008
Remote Controls Switch From IR To RF—And It's About Time They Did
Most remote controls on TV sets, DVD players, audio systems, and other consumer equipment use infrared (IR) technology, just as they have for decades. But while IR still works well, it’s showing its age. Today’s large-screen HDTVs, next-generation DVD players, DVRs, and surroundsound systems need something more sophisticated.
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Louis E. Frenzel
December 13, 2007 Low-Power SoC Improves Wi-Fi Battery Life For Sensor Networks
When implementing a wireless sensor network, most engineers look to ZigBee or other alternatives from CrossBow, Dust Networks, and Z-Wave. Wi-Fi enjoys widespread use, familiarity, and low cost. But its network topology and high power consumption usually cause it to be dismissed early as a viable option. The GS1010 from GainSpan Corp., though, targets sensor networks. This 802.11 chipâ??s very low power consumption can provide up to 10 years of AA...
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Louis E. Frenzel
December 13, 2007 Battery-Free Wireless Module Empowers Mesh Sensor Networks
Wireless sensor devices are cable-free, but they still require a battery that will occasionally need replacement. While transceivers with lower power consumption have boosted battery life in some products, their batteries ultimately will die and require service. The GreenPeak Lime CM-08 module solves that problem for sensor monitoring and control devices (see the figure). Developed by GreenPeak Technologies, it...
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Louis E. Frenzel
December 13, 2007 Wireless Laptop Access Solution Uses 3G Technologies
Laptop users typically access the Internet via Wi-Fi and a nearby hotspot or access point. Alternatively, they may have a plug-in USB device or PC card for GSM/EDGE/WCDMA or CDMA. Soon, they also will be able to get embedded Internet access and e-mail from any of their nearby 3G cellular services thanks to Qualcommâ??s Gobi system. Mixing Qualcommâ??s MDM1000 chip set, related software, and APIs, Gobi supports the most popular and...
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Louis E. Frenzel
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